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- Geographic Data Technology, Inc. (GDT)104
- United States. Department of Housing and Urban Development47
- TomTom North America, Inc.13
- Esri12
- Environmental Systems Research Institute (Redlands, Calif.)9
- U.S. Department of Commerce, Census Bureau8
- United States. Bureau of Transportation Statistics7
- United States. Bureau of the Census. Geography Division5
- Kelso, Nathaniel Vaughn3
- Patterson, Tom3
- U.S. Census Bureau3
- Environmental Systems Research Institute, Inc. (ESRI)2
- National Atlas of the United States2
- U.S. Census Bureau, Geography Division2
- U.S. Department of Commerce, Census Bureau, Geography Division2
- Rawson, Peg1
- Tele Atlas (Firm : U.S.)1
- U.S. Census Bureau. Geography Division1